import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.xml.crypto.Data;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Date;
@WebServlet("/refresh2")
public class RefreshServlet2 extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        //每个1s就在浏览器页面上进行刷新一次
        Date date = new Date();
        SimpleDateFormat format = new SimpleDateFormat("yyyy-mm-dd HH:mm:ss");
        resp.setHeader("Refresh","1");
        resp.getWriter().write("time= " + format.format(date));
    }
}
